-a^{a0,a2}_{a1,v0} b^{}_{} c^{a4,v1}_{c0,a3} eta1^{a3}_{a2} gamma1^{a1}_{a4} a+(c0) a+(v0) a-(v1) a-(a0)
-a^{a0,a2}_{a1,v0} b^{}_{} c^{a4,v1}_{c0,a3} lambda2^{a1,a3}_{a2,a4} a+(c0) a+(v0) a-(v1) a-(a0)
-1/2 a^{a2,a3}_{a1,v0} b^{}_{} c^{a0,v1}_{c0,a4} lambda2^{a1,a4}_{a2,a3} a+(c0) a+(v0) a-(v1) a-(a0)